This standard specifies a method for measuring the efficiency of a power regulator in a stand-alone network solar voltage system, where the output of the power regulator is a stable AC voltage of a certain frequency or a stable DC voltage. This standard is also applicable to the case of the enclosed isolation transformer.
IEC 61683:1999 history
1999IEC 61683:1999 Photovoltaic systems - Power conditioners - Procedure for measuring efficiency